The cut depends on what you're "allowed" to put on it.
Fillet - salt & pepper
Porterhouse - salt, pepper, garlic
Strip - salt, pepper, Steak Seasoning (Montreal Steak is great)
London Broil - marinate that baby overnight
Cube Steak - ketchup
Good call using the bullet smoker. I like doing whole chickens or BB ribs in mine. Nothing compares!